Shulou(Shulou.com)06/01 Report--

In this issue, the editor will bring you about the commonly used commands in the CentOS system. The article is rich in content and analyzes and describes for you from a professional point of view. I hope you can get something after reading this article.

# uname-a

# View kernel / operating system / CPU information

# head-n 1 / etc/issue # View operating system version

# cat / proc/cpuinfo # View CPU information

# hostname # View computer name

# lspci-tv # list all PCI devices

# lsusb-tv # list all USB devices

# lsmod # list the loaded kernel modules

# env # View environment variables

Resources

# free-m # View memory usage and swap area usage

# df-h # View the usage of each partition

# du-sh # View the size of the specified directory

# grep MemTotal / proc/meminfo # check the total memory

# grep MemFree / proc/meminfo # check the amount of free memory

# uptime # View system running time, number of users, and load

# cat / proc/loadavg # View system load

Disks and partitions

# mount | column-t # to view the status of attached partitions

# fdisk-l # View all partitions

# swapon-s # View all swap partitions

# hdparm-I / dev/hda # View disk parameters (for IDE devices only)

# dmesg | grep IDE # check the detection status of IDE devices at startup

The network

# ifconfig # View the properties of all network interfaces

# iptables-L # View firewall settings

# route-n # View the routing table

# netstat-lntp # View all listening ports

# netstat-antp # View all established connections

# netstat-s # View network statistics

Process

# ps-ef # View all processes

# top # Real-time display of process status

User

# w # View active users

# id # View specified user information

# last # View user login log

# cut-d:-F1 / etc/passwd # View all users of the system

# cut-d:-F1 / etc/group # View all groups of the system

# crontab-l # View the current user's scheduled tasks

Service

# chkconfig-- list # list all system services

# chkconfig-- list | grep on # lists all started system services

program

# rpm-qa # View all installed packages

To modify hostname, you need to modify two points:

1) vim / etc/sysconfig/network modifies HOSTNAME=your_hostname

2) vim / etc/hosts modified 12.160.134.168 your_hostname

Python installation

1) download Python and download Python-2.7.6.tar.xz directly

2) install .tar.xz decompression tool: yum-y install xz

3) extract the .tar.xz file: unxz Python-2.7.6.tar.xz and tar xvf Python-2.7.6.tar

4) cd Python-2.7.6

5). / configure-prefix=/usr/local-enable-unicode=ucs4-enable-shared LDFLAGS= "- Wl,-rpath / usr/local/lib"

Make & & make altinstall

Pip installation

1) wget https://bitbucket.org/pypa/setuptools/raw/bootstrap/ez_setup.py

2) python2.7 ez_setup.py

3) easy_install-2.7 pip

4) pip2.7 install [packagename]

Pip2.7 install-- upgrade [packagename]

Pip2.7 uninstall [packagename]

These are the commonly used commands in the CentOS system shared by the editor. If you happen to have similar doubts, you might as well refer to the above analysis to understand. If you want to know more about it, you are welcome to follow the industry information channel.

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